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06/15/2007 at 04:56AM PDT, ID: 22636084
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8.2

ASP.NET 2.0 - download file & postback problems

Asked by Contestoas in Programming for ASP.NET, Microsoft Visual Basic.Net, Visual Studio

Tags: postback, file, download

Hi
I have a button on my page that does the following:
1. Reset a label control Me.lblError.Text = ""
2. Generates a PDF file on the server, if the PDF file fails to create because the user has supplied a serch that does not return any data the code exits and Me.lblError.Text  = "some error message"
3. Downloads the PDF like this:
Response.Clear()
Response.AddHeader("Content-Disposition", "attachment; filename=" & file.Name)
Response.AddHeader("Content-Length", file.Length.ToString())
Response.ContentType = "application/octet-stream"
Response.WriteFile(file.FullName)
Response.Flush()
Response.End()

My problem is that if the code perform a download the text in Me.lblError.Text is not set correctly....
That means that the error from the previous search is still there!

It looks like the postback is aborted after the response.flush/end during file download so that the label control is not updated!

I tried deleting the two lines:
Response.Flush()
Response.End()
but that did not help ......

How can I avoid this.

Peter
[+][-]06/15/07 05:13 AM, ID: 19291026

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[+][-]06/15/07 05:15 AM, ID: 19291043

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[+][-]06/15/07 05:16 AM, ID: 19291046

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[+][-]06/15/07 05:18 AM, ID: 19291056

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[+][-]06/15/07 05:20 AM, ID: 19291071

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[+][-]06/15/07 05:21 AM, ID: 19291087

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[+][-]06/15/07 05:22 AM, ID: 19291089

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[+][-]06/15/07 05:41 AM, ID: 19291224

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About this solution

Zones: Programming for ASP.NET, Microsoft Visual Basic.Net, Visual Studio
Tags: postback, file, download
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Solution Provided By: crisco96
Participating Experts: 4
Solution Grade: A
 
 
[+][-]06/15/07 05:43 AM, ID: 19291253

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[+][-]06/15/07 05:45 AM, ID: 19291261

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